create binary in build process

Author: kiahjh

.gitignore

@@ -1 +1,2 @@
 /target
+**/build

examples/cool_app/config.toml

@@ -5,6 +5,9 @@ use crate::{
     blush::combiner::Combiner, checker::Checker,
     codegen::emitters::x86_64_linux_nasm::CodeGenerator, ir::IRGenerator, parser::Parser,
 };
+use std::fs::File;
+use std::io::Write;
+use std::process::Command;
 use std::{
     error::Error,
     fs,
@@ -18,7 +21,7 @@ pub mod printer;
 pub struct Blush {}
 
 impl Blush {
-    pub fn build(path: String) -> Result<(), Box<dyn Error>> {
+    pub fn build(path: &str, just_asm: bool) -> Result<(), Box<dyn Error>> {
         let path_buf = PathBuf::from(path);
         let file_tree = collect_files(&path_buf)?;
 
@@ -69,7 +72,37 @@ impl Blush {
         let ir = IRGenerator::new(checker.types).program_ir(&checked_program);
         let asm = CodeGenerator::new().gen_asm(&ir);
 
-        println!("\n---\n{asm}\n---\n");
+        if just_asm {
+            println!("\n{asm}\n");
+        } else {
+            // make build directory if it doesn't exist
+            let path = Path::new(path).join("build");
+            fs::create_dir_all(&path)?;
+
+            // generate asm file
+            let mut out_file = File::create(path.join("out.asm"))?;
+            out_file.write_all(asm.as_bytes())?;
+
+            // assemble asm into object file
+            Command::new("nasm")
+                .arg("-f")
+                .arg("elf64")
+                .arg("-o")
+                .arg(path.join("out.o"))
+                .arg(path.join("out.asm"))
+                .output()?;
+
+            // link object file into executable
+            Command::new("ld")
+                .arg("-o")
+                .arg(path.join(package_name))
+                .arg(path.join("out.o"))
+                .output()?;
+
+            // delete intermediate files
+            fs::remove_file(path.join("out.asm"))?;
+            fs::remove_file(path.join("out.o"))?;
+        }
 
         Ok(())
     }

examples/cool_app/lib/math.lv

@@ -23,6 +23,9 @@ pub static VERSION: &str = env!("CARGO_PKG_VERSION");
 struct Cli {
     #[command(subcommand)]
     command: Commands,
+
+    #[arg(long)]
+    asm: bool,
 }
 
 #[derive(Subcommand)]
@@ -39,7 +42,7 @@ fn main() {
     match cli.command {
         Commands::Build { path } => {
             println!();
-            let res = Blush::build(path);
+            let res = Blush::build(&path, cli.asm);
             match res {
                 Ok(()) => {
                     blush::printer::success("Build complete!");